Pipe-dressing machine.



No. 763,568 PATENTED JUNE 23, 1904 0. QUANDT.

PIPE DRESSING MACHINE. APPLICATION FILED 0051.4, 1,899.

N0 MODEL.

A No. 763,568.

UNITED" STATES Patented June 28, 1904.

PATENT OFFICE.

OTTO QUANDTQ- LOS AN GELES, CALIFORNIA, ASSIGNOR OF ONE-HALF TO ARTHUR O. HARPER, OF LOS ANGELES, CALIFORNIA.

PIPE-DRESSING MACHINE.

s'rEcIFIcAFrION fo ming part of Letters Patent No: 7 3,568, dated June 28, 1904.

Application filed October 4, 1899.

T all/1117mm, it may concern:

Be it known that I, OrTo QUANDT, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Pipe- Dressing Machine, ofwhich the following is a specification.v Y

My invention is designed for truing the ends of pipe-sections in the manufacture of sheetmetal pipe. The pipe to whichl more particularly 'refer is pipe made for well-casings and the like and constructed of sections of two sizes, two sections of the smaller size being inserted half-wayinto a. section of the larger size and sections of larger sizedriven onto the sections of smaller size, so that the pipe consists of a double thickness of pipe-sections driven together and with lapping'joints. Such pipes are'often sunk .in the earth toa depth of two thousand feet, so that any slight variation from tr ulyrsquared ends may produce very serious deflection of the pipe and prevent the same from being driven to the required depth. It is important in constructing a pipe of this kind that the. ends of each section be exactly at right angles to the axis of the pipe, and heretofore the pipe has ordinarily been trued at the ends at great expense of time and labor by means of shears and files The object of my invention is to provide a' simple and effective machine for rapidly and perfectly performing this work. In order to accomplish said object, I provide a machine having 'expansible heads mounted on a mandrel one end of which is supported bya swinging tail-stock or carriage having a center seat a, adapted to hold the end of the-mandrel.

My invention is applicable for truing and beveling the ends of hollow open-ended cylinders of any kind. It can be applied in various ways.

The accompanying drawings illustrate my invention in one of the forms in which it can be applied. 1

Figure 1' is a perspective view of my machine in operation, a section of pipe being shown in position to be dressed, parts of the same being broken away to expose the mandrel-head. Fig. 2 is a fragmental plan-section Serial No. 732,560. (No model.)

the mandrel ready to receive the pipe to be I;

dressed. Means for expanding the radial arms are also shown.

My newly-invented pipe-dressing machine I comprises a mandrel A, having in its end a center seat a, two heads B B, fixed to. the free end of the mandrel to rotate therewithand respectively provided with radial sliding arms 6, means for foromg said arms outward to engage the inside of the pipe to be trimmed, means for rotating the mandrel, and a cutter for cutting the end of the pipe when the same is held by said arms. In practice two cuttersare preferably provided, one near each of the heads and each located outside of the'plane' of rotation of said arms-that is to say, the

heads are between the two cutters, so that be respectively adjusted to cut away the opposite ends of the pipe-section. The means for forcing said arms outward to engage the inside of the pipe to be trimmed may be con structed in different ways. In Figs. 2and 4:,

when the heads are in the pipe the cutters can O indicates a tapered sleeve whichhs'lides upon the mandrel and enters the space between the mandrel and the ends of the several pins 5. The sleeve C slides upon the mandrel and is provided opposite the tapered end with an internal-screw-threaded seat 0, which 'holes 0" to receive a handle E, by which the sleeve can be turned to screw it on and off the screw D to thereby slide the sleeveO along the shaft. F indicates springs for drawing the pins 6 inward away from the'pipe Gr when the tapering sleeve is withdrawn. By this resilient means the pins are simultaneously withdrawn from contact with the inside of the pipe whenever the sleeve C is removed to allow the pins to move inward toward the mandrel.

The mandrel A is mounted in bearings H H at one end and projects from the bearings at the other end, and the two heads are mounted upon the free end of said mandrel.

I I indicate cutters which are adapted to be adjusted to trim the end of the pipe G when the same is in place on the heads.

J indicates a pivoted carriage or headblock provided with an adjustable center K. L indicates a stop for the carriage to hold the same in position with said center K set coaxial with the shaft or mandrel A. This stop consists of a bolt, and a nut Z is screwed upon the bolt to hold the block or carriage in fixed position. The centering point K screws through the head j of the blockJ to enter the seat a in the mandrel to steady the end thereof in the ordinary way.

N 0 indicate a cog-wheel and pinion for driving the shaft A.

P indicates a belt-pulley for driving th shaft Q, which drives the pinion O.

R indicates the pivot upon which the headblock or carriage J is pivoted.

Each of the heads is provided with means for forcing the arms outward.

Various mechanical devices may be used for forcing the arms outward without departing from my invention, but I at present deem the means herein shown to be. the best for this purpose.

In practical operation the workman will swing the carriage j away from the mandrel,

the ends to the pipes may be accomplished with great rapidity.

What I claim, and desire to secure by Letters Patent of the United States, is

1. A pipe-dressing machine comprising a mandrel, having one end free and provided with a center seat, expansible heads fixed to the mandrel, means for expanding said heads, a stationary cutter for cutting one end of the pipe when the same is held by said head, a swinging carriage furnished with a center to enter said center seat and means for clamping the carriage in place with said center in said center seat; a cutter on the carriage'for cutting the other end of the pipe when the center is in said seat, and means for rotating the mandrel.

2. A pipe-dressing machine, comprising a mandrel having a center seat in the ends, a movable tail-stock having a center forsaid center seat, a cutter mounted on said tail-stock, and means for clamping the tail-stock in place with the said center in said seat.

3. A pipe-dressing machine comprising a mandrel mounted in bearings at one end and projecting from the bearings at the other end; means for rotating the mandrel; twoheads mounted upon the free end of said mandrel and provided with radially-sliding arms; resilient means for retracting said arms; means for simultaneously forcing said arms outward; a pivoted carriage provided with an adjustable center; a stopfor said carriage to hold the same in position with said center coaxial with the shaft; and means for clamping the carriage in position with the center axial of the shaft. K

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, at Los Angel'es,California, this 22d day of September, 1899.

OTTO QUANDT. Witnesses:

JAMES R. TOWNSEND, FRANCIS M. TOWNSEND. 

